Parallel motion



1951 E. A. MASTRIAN I ET AL 2,575,456

PARALLEL MOTION Filed April 21, .1950

4 Sheets-Sheet l INVENTORS. ELVIN A. MASTRIANI KAROL KULCZYCKI ATTORNEY20, 1951 E. A. MASTRIANI ET AL 2,575,456

PARALLEL MOTION Filed April 21, 1950 4 Sheets-Sheet 2 ,406 60 Q 64 b2 I5:

' INVENTORS.

ELVlN A. MASTRIANI KAROL KULCZYCKI ATTORNEY 1951 E. A. MASTRIANI ETAL2,575,456

} PARALLEL MOTION Filed April 21, 1950 7 4 sheets-sheet s INVENTORS.LVIN A MASTRIANI Fl 5 I E BYKAROL KL JLQCZQYCKI ATTORNEY Nov. 20, 1951E. A. MASTRIANI ET AL 2,575,456

PARALLEL MOTION Filed April 21, 1950 4 Sheets-Sheet 4 42a. 44 48a. 4 i5011 NOAF I I 66 i 650. 90a. g 5

41a, 44a. 40a

' INVENTORS. ELVIN- A. MASTRIANI KAROL KULCZYCKI M z %m ATTORNEYPatented Nov. 20, 1951 PARALLEL MOTION Elvin A. Mastriani, Cedar Grove,N. J and Karol Kulczycki, Brooklyn, N. Y., assignors, by mesneassignments, to Steel and Alloy Tank Company, Newark, N. J., acorporation of New Jersey Application April 21, 1950, Serial No. 157,381

5 Claims. (01. 139-149) The present invention relates to a parallelmotion for a loom of the fly shuttle type.

The purpose of the parallel motion is to move the picker in a directionas nearly as possible parallel to the race plate. Without some sucharrangement, the picker in traveling from one end .of the shuttle box tothe other would describe an are. This would give it a higher position atone part of its movement than at another and would cause thereby a veryunsatisfactory pick.

The parallel motions of the prior art have involved either a rockerattached to the picker stick and cradling on a shoe or have includedlinear slide or slotted connections resulting in lost movements, rapidwear, defective picks and rapid destruction of the picker stick.

One object of the present invention is to provide a new and improvedparallel motion substantially free from the defects of the prior artreferred to.

Various objects of the invention are apparent from the followingparticular description and from an inspection of the accompanyingdrawings, in which:

Fig. 1 is a Side elevation of the loom taken ment therewith. The bracket22 has a hub 23 from its right-hand side and showing a form of parallelmotion embodyin the present invention; Fig. 2 is a section of theparallel motion taken along the lines 2-2 of Fig. 1, but shown on anenlarged scale;

Fig. 3 is a section of the parallel motion taken along the lines 33 ofFig. 1, but shown on an enlarged scale;

Fig. 4 is a section of theparallel motion taken along the lines 44 ofFig. 3;

Figs. 5 and 6 are sections of the parallel motion taken along the'lines5-5 and 6-6 of Fig. 2 respectively;

Fig. 7 is a side' elevation of the loom taken from its right-hand sideand showing another form of parallel motion embodying the presentinvention;

Fig. 8 is a section of the loom taken along the lines 8-8 of Fig. 7, butshown on an enlarged scale; and

Figs. 9, 10 and 11 are sections of the loom taken on the lines99, Ill-land I l-l l of Fig. 8 respectively.

Referring to Fig. '1 of the drawings, only the parallel motion for thepicker stick on the righthand side of the loom isshown, but it must beunderstood that the parallel motion for the picker stick on theleft-hand side of the loom is of similar construction:

The loom is shown comprising loomsides In, each including a pair ofvertical opposed webs or plates ll rigidly securedtogether by braces andcross-pieces (not shown). A lay I3 is reciprocated along the loom by layswords I4 se-' cured thereto and oscillated from cranks (not shown)through connecting rods (not shown) in a manner well known in' the art.Each of the lay swords I4 is located between the plates ll of thecorresponding loomside 10 and'is fastened at its lower end to 'arespective rocker-shaft l5 journalled in suitable bearings (not shown)mounted on these plates.

A picker stick [6 with a picker ISA at its upper end is provided forhurling the shuttle (not shown) across the raceway of the lay l3. Thepicker stick I6 is connected at its lower end' to a parallel motion l8serving to move the picker in a direction parallel to the raceway.

The form of parallel motion shown in Figs. l-G is mounted on acantilever part 2| of the rocker-shaft l5 projecting outwardly from thebearing on the outer loomside plate II and comprises a bracket 22secured to said shaft part in a mannerto be described for rockingmoveembracing the rocker-shaft l5 and has four reinforcing ribs 24radiating from said hub in quadrant relationship and extending betweenend flanges 25 and 25.

The connection between the bracket 22 and the rocker-shaft l5 desirablycomprises a tangent pin lock 21 including a sleeve 28 tangentiallyseated on said shaft and rigidly secured to the bracket hub 23 and toone of the ribs 24, as for example by welding. The sleeve 28 has acut-out or slot 30 through which the rocker-shaft l5 peripherallyextends and slidably receives a pair of wedges 3| through which a bolt32 passes. The inner opposed end sections 33 of these wedges 3| areconcavely bevelled for conforming engagement with the periphery of therocker-shaft 15 where it extends through the slot 30 of the sleeve 28.Tightening of the bolt 32 draws the wedges 3| on to the rocker-shaft l5and thereby locks the bracket 22' on to said shaft. By, loosening thebolt 32, the rotative position of the bracket 22 on the rocker-shaft l5can be adjusted' The bracket 22 carries supports 31 and 38 for a pin oraxle 39 transverse to the rocker-shaft l5 and pivotally mounting asubstantially horizontal arm 40, in .a manner to be described. Thesesupports are rigidly secured to the bracket flange 26 by webs 4| and 42integral as shown or otherwise rigid with said flange and the axle,

3 39 is fixed in said supports, as for example by set screws 43.

The arm 40 is of skeletonizecl construction and comprises two parallelfacing webs 44 rigidly connected together into a unit by a cross-piece65 integral, therewith as shown or otherwiserigidly connected thereto.The webs M terminate at one end in respective hubs 4B embracing bushingsI50 on the axle 39 with a rotative fit for pivotal movement thereon. Atthe other end, the arm Webs 44 rigidly carry a pin 48 held in positionthereon by set screws 50 and forming. part of a linkage for supportingand guiding the picker stick I6, as will hereinafter be more fullydescribed. y 7 V Integral as shown or otherwise rigid with the bracketflange 26 and extendingupwardly from the bracket 22 is a frame plate 55mounting rigid therewith a bearing 5'6 for a pivot or crank shaft 51narallelto the axle 3'9. Secured to the pivot shaft-.51 is'jan arrri 69in the form of a simple crank shorter than the arm 49 and suspendeddownwardly from thebearing 58. The crank 69 is'pivotally connected tothe upper end of an upstanding link. or connectingfrod 6|, as forexarnplbymeans of a pin 62 integral or otherwise rigid with, said crankandjourn'alled in an end bearing fl on said link. The pin 62 is retainedin the link bearing 63'againstaxial displacement by a nut and washerconnection 54. The lower endofthe link 6'! is pivotally connected to thecuter end of the arm 49 and for that purpose, a bearing QS on said linkembraces with a rotative fit a bushing 9'6 on the pin 48 between thewebs 44 of saidarm. v k The link 6i has a side extension 19 for securingthef lower end of the picker stick l8 thereto and alongsidethereofthrough bolts II. The picker stick 16 thereby follows themovement of thelink EL. which in turn follows a guided course throughthe constraining action .of the arm 49 and the crank. 6J1! pivotallysupporting said link. The uppenend of .the picker stick IE is therebymade to follow a course parallel to the raceway of the lay [9 as it isdrawn inwardly towards the loom by heri m on Thepick motion per, seforms no part of the presentinvention and .may be of any suitable form.The specific form of pick motion shown is the gsubject matter of acopendin'g application er l N 57. 82 l A r 21, 0. and mprises a lugconneetion 80 between the outer end t r1 n rs aii cm; s ow and thepicker sti 16, for transmitting the movement hi this shaft arm to saidpickerstick and for thereby applying to the shuttle {not shown)sufflcient force to sees t across me loom and into the opposite box.The'lug connection 99 comprises a rigid lug stick 8! connected to theouter end or the picking-shaft re; by a self-aligning bearing 19 a rigidlug strap 82 connected to said lug stick by a self-aligning bearing (notShown) and engaging the picker stick Hi. The log strap 82 comprises 'apair of rigid bars 93 and 84' flanking the' picker stick l6 andprojecting t their outer 'nds' beyond said stick. A catch 85 provided'witha cushioning pad 86 and pivotally supported between the strap bars 83and 8t engages the outer edge of the picker stick l6.

'Ihe lu'g' 'strap fiz is guided for endwise movemerit as operated fromthe pick cam. For that ailsst, there is provided a guide 8! integ ral asshown or otherwise rigid with the upper end of a bracket frame plate 88rigidly secured to the bracket frame plate 55, as for example, by

4 bolts 99. The guide 81 has a T-slot and the strap bar 84 is ofcorresponding formation to fit in said slot with a guide fit.

The pick motion described operates to drive the picker stick l6 inwardlytowards the loom for shuttle hurling operations. To check the pickerstick 6 after the shuttle has left the picker thereon, there is provideda bumper device in the form of an upstanding bumper bar mounted forpivotal movement about the axle 39 and having for that purpose a hub 9|between the hubs 46 of the arm 49 embracing the bushing 4'! on said axlewith ajrotative fit. A coil spring 93 between the bracket flange 29 andthe bumper bar merges said bar about the axle 39 into the position shownin Fig. 2. The upper end of the bumper bar 99 has a flat impact surface94 coveredwith a pad 95 of cushioning material, such as leather orrubber secured to said bar by screws cc and disposed in the path ofmovement of the linktt. H H To limit the rotative position of the bumperbar 93 about the axle 39 againstth'e expansive ac: tion' of the ,coilspring 93, the lower end of said bar carries a screw 91 threaded thereinand having a head 98 adapted in limiting position to engage a pad I90 ofcushioning material such as leather or rubber afiixed to the bracketflange 25 by screws NH. The screw 91 is adjustedin the bumper bar 90 inposition to' extend the surface of the impact pad 95 in a directionparallel to'the inner edge H32 of the link Bljagt the instant said linkreaches said pad, so that the impact of said link from the picker stick[6' is transmittedto said pad across its full heightas shown in dot anddash lines in Fig. 2. Further movement of the picker stick 16 is checkedby the counteraction of the spring 93 until said stick isstopped.Stopping of the picker stick I6 is thereby accomplished with minimum ofshock. H

After the picker stick I6 is stopped in inward position, it is returnedoutwardly by the ex ensive action ofthe spring 93, until the bumper bar99 reaches the limiting position shown in fuli lines in Fig. 2. Furtheroutward movement or the picker stick 16 towards the position shown infull lines in Fig. 2 is eifected through the action of aspiral returnspring H15 acting on the pivot or crank shaft 51. For mountingthe-spring I95, the crank shaft 5'1 has an axial end. extension 16. ofsubstantially square cross-section. The spring i05 is wound around thecrank shaft extension I96 and has its inner end conformahly wrapped foranchorage around said shaft exten sion and has its outer endloopedaround and thereby anchored to a pin I01 afiixed to acollar H18 on thebearing 56. A set screw (not shown} in the collar I08 and impinging onthe bearing 56 holds said collar in adjusted position according to the.tension stress on the spring 195 desired. I

In the operation of the parallel motion described, as the lay l3 movesalong the loom by the action of the crank operated lay swords ll. therocker-shaft l5 secured to the lower end of each ofsaid layswords isoscillated and this causes the parallel motion on said shaft to rock andthe picker Stick 16 carried by said motion to move with the lay alongthe loom. V 7

While the picker stick I6 is in the outer inactive position shown inFig. 2, the picking-shaft arm: (not shown) operated through the pickingcam (not shown) draws the picker stick |6 forcibly inwardly towards the100th through the lug connection 80. The picker stick l 5 during itspicking movement moves 'angularly about the pin 48 carried by the arm 40at its outer end.,-.This angular movement of the picker stick l6transferred to the link Bl causes the crank 60 to rotate clockwise (Fig.2) about the axis of the pivot shaft 51 and the link to move downwardlysubstantially endwise-.---This moves the picker stick 16 substantiallyendwise,- so that the upper picker end of said stick-instead offollowing an arcuate course during picking movement of said stickfollows a substantially straight. course parallel to the raceway on thelay 13.

The bumper bar 90 comes into play near the endi of the picking stroke ofthe picker stick IE to check the stick and to initiate its return andthe spring I05 completes the return of the picker stick to the outerinactive position shown in Fig. 2.

Figs. 7-11 show a modified form of parallel motion comprising a bracket228, secured by the tangent pin lock 21a to the cantilever part 2| ofthe rocker-shaft l5 and having a hub 23a embracing the rocker shaft I5and four ribs 245, radiating from said hub in quadrant relationship andextending between end flanges 25a and 26a.

The bracket 222. carries the supports 31a and 38a for the axle 39apivotally mounting a crank arm 409.. These supports are rigidly securedto the bracket flange 2'68. by webs 4's. and 42a. integral as shown orotherwise rigid with said flange and the axle 39a is fixed in saidsupports, as for example, by set screws 43a.

The arm 40a has webs 44a, terminating at one end in respective hubs 46aembracing the bushings I503. on the axle 39a with a rotative fit. At theother end, the arm webs 44a rigidly carry a pin 48a held thereon by setscrews 50a.

Integral as shown or otherwise rigid with the bracket flange 26a. andextending upwardly from the bracket 22a. is a pair of parallel opposedplates 55a. mounting rigid therewith respective coaxial bearings 56a forrespective pivot or crank shafts 51a. Secured to respective pivot shafts51s are the inner ends of arms 60s in the form of cranks pivotallyconnected to the upper end of the upstanding link or connecting rod Bla.The outer ends of the cranks 602. are rigidly secured by tapered pinbolts 64a to the ends respectively of a pin 52a. journalled in an endbearing 63s. on the link B'a. The pin 62a forms with the cranks 60a adouble crank unit and constitutes the wristpin for said crank unit.

The lower end of the link Bla is pivotally connected to the outer end ofthe arm 493, by a hearing 65a on said link embracing with a rotative fita bushing 663. on the pin 489. between the webs 44a of said arm.

The lower end of the picker stick 6a. is secured to the link 6 la by abolt I la bearing against a backing plate 698. on the outer edge of thepicker stick and passing through said stick and said link.

The form of pick motion shown in Figs. 7 and 8 is described and coveredper se in the aforesaid copending application and comprises a lugconnection 805. between the outer end of the pickingshaft arm (notshown) and the picker stick '59. for transmitting the movement of thisshaft arm to said picker stick. This lug connection comprises a rigidlug stick 8 la connected to the outer end of the picking-shaft arm by aself-aligning bearing and a rigid lug strap 82a connected to said lugstick by a self-aligning bearing 19a and engaging the picker stick. Thelug strap 829. comprises a pair of rigid bars 839. and 84a flankin'g thepicker stick His and projecting. at their outer ends beyond said stickrA catch a. in the form of a resilient roller is rotatively supportedbetweenthe strap bars 83a and '84s and engages the outer-edge of thepicker stick Ilia.

The lugstrap 82a is guided for endwise movement by-a' pair of tubularguides 81a, integral as shown 'or-otherwise rigid with the upper ends ofthe-bracket plates 55a. These guides embrace thelug bars 833, and 84arespectively with a snug slide-fit" i J 5 The bumper device for checkingthe picker stick 6a after the shuttle has left the picker thereon,comprises an upstanding bumper bar 903, mounted for pivotal movementabout the axle 39a and having for that purpose a hub 9|a between thehubs 46a. of the arm 40a embracing the bushing 419. on said axle with arotative fit. A coil spring 93a between the bracket fiange 26a and thebumper bar 903. urges said bar about the axle 39a. in the position shownin Fig. 8. The upper end of the bumper bar a is curved to present aconvex surface tothe picker stick l6& and extends between the lugs bars835. and 84a. The impact surface of this bumper bar is covered with apad 95a of cushioning material, such as leather or rubber secured tosaid bar by screws 96a.

To limit the rotative position of the bumper bar 909. about the axle 39aagainst the expansive action of the coil spring 93a, the lower endsection of said bar is offset to extend along the bottom of the bracket22a and adjustably carries a screw 91a threaded therein and having ahead 98a adapted in limiting position to engage a pad Hlfla ofcushioning material such as leather or rubber affixed to the lower sideof said bracket by screws He.

The return of the picker stick lfia into outward position shown in Fig.8 is effected by a spring 05a between a lower extension III] of the linkSla and a lug IH rigid with the bracket 22a.

While the invention has been described with particular reference tospecific embodiments, it is to be understood that it is not to belimited thereto, but is to be construed broadly and restricted solely bythe scope of the appended claims.

What is claimed is:

1. In a loom, the combination comprising a picker stick, a parallelmotion for said picker stick having a rockable bracket, a frame rigidwith said bracket for rocking movement therewith, and a pick motion forsaid picker stick comprising a rigid lug strap, and means mounted onsaid frame for supporting and guiding said lug strap in its endwisepicking movement.

2. In a loom, the combination comprising a picker stick, a parallelmotion for said picker stick having a rockable bracket, a frame securedto said bracket for rocking movement therewith, and a pick motion forsaid picker stick comprising a pair of rigid parallel lug bars flankingthe picker stick and connected together as a unit to form a lug strap,and means secured to said bracket for guiding and supporting one of saidlug bars for endwise movement.

3. In a loom, the combination as described in claim 2, said guidingmeans consisting of a single channel member having a guide slot, one ofsaid lug bars extending in said slot with a snug slide fit.

4. In a loom, the combination as described in claim 2, said guidingmeans comprising a channel member having a T-slot, one of said lug barshavmay Z; ing a corresponding cross-section and extending in said slotwith a snug slide fit.

5. In a 100111, the combination comprising a picker stick, a parallelmotion for said picker stick having a rockable bracket, 2, pair ofopposed parallel frame plates secured to said bracket for rockingmovement therewith and upstanding therefrom, and a pick motion for saidpicker stick comprising a pair of rigid parallel lug bars flanking :thepicker stick and connected together as a unit to form a lug strap, and apair of guides for said bars respectively secured to the upper ends,ofsaid frame plates respectively.

ELVIN A. MAS'IYRIANI. KAROL KULCZYCKL 8. REFERENCES CITED The followingreferences are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 571,729 Paige Nov. 17, 18962,484,119 Rinne Oct. 11, 1949 2,506,145 French May 2, 1950 10 2,519,372Hufi'erd Aug. 22 1950 FOREIGN PATENTS Number Country Date 634,943Germany Sept. 5, 1936 862,988 France Dec. 23, 1940

